cuck·oo 
(kk, kk)
(kk, kk)n. pl. cuck·oos
1.
a. A grayish bird (Cuculus canorus) of Eurasia and Africa that has a characteristic two-note call and lays its eggs in the nests of birds of other species.
b. Any of various other birds of the family Cuculidae.
2. The call or cry of one of these birds.
3. Slang A foolish or crazy person.
tr.v. cuck·ooed, cuck·oo·ing, cuck·oos
To repeat incessantly, as a cuckoo does its call.
adj.
Slang
Slang
Lacking in sense; foolish or crazy.
[Middle English cuccu, of imitative origin.]
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